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If you need more practice, here is another list of 20 string coding questions. Our 1000+ “Data Structure – Part 1” (along with 1000+ “Data Structures & Algorithms – Part 2”) questions and answers focuses on all areas of Data Structure covering 200+ topics in Data Structure. This article is like a Gold mine for me. This is super interesting list of questions and the best possible solutions discussed in terms of time and space efficiency (from brute force solution to the most optimum). Here is a list of popular binary tree-based coding questions from software engineer or developer job interviews: If you feel that your understanding of binary tree coding is inadequate and you can't solve these questions on your own, I suggest you go back and pick a good data structure and algorithm course like From 0 to 1: Data Structures & Algorithms in Java. It also comes in varieties like a singly linked list, which allows you to traverse in one direction (forward or reverse); a doubly linked list, which allows you to traverse in both directions (forward and backward); and finally, the circular linked list, which forms a circle. Built on Forem — the open source software that powers DEV and other inclusive communities. A linked list is nothing but a list of nodes where each node contains the value stored and the address of the next node. Week 4: Hash tables. 10 Algorithm Books Every Programmer Should Read Templates let you quickly answer FAQs or store snippets for re-use. It is nearly complete (and over 500 pages total!! Unlike static PDF ADTs, Data Structures, And Problem Solving With C++ 2nd Edition solution manuals or printed answer keys, our experts show you how to solve each problem step-by-step. Solutions may not be optimal, but relied on the concepts taught in that particular chapter plus some extra coding techniques that I've veen playing around with. Starting from the basic idea that tensile necking begins at the maximum load point, find the true Along with array and linked list data structures, a string is another popular topic on programming job interviews. The explanation and the solution TechieDelight provides on most questions is probably the best available online, much better than every other website. Thanks for this wonderful website. They must be able to control the low-level details that a user simply assumes. I have also shared a lot of these questions on my blog, so if you are really interested, you can always go there and search for them. This is truly going to be invaluable, thank you! Once you have gone through these questions, you should feel confident enough to attend any telephonic or face-to-face interviews. From 0 to 1: Data Structures & Algorithms in Java So far, we have looked at only the linear data structure, but all information in the real world cannot be represented in linear fashion, and that's where tree data structure helps. A linked list is another common data structure that complements the array data structure. If we solve each and every question, then you can crack any coding interview 1000% sure. This article helps me a lot during my interview. Thanks a lot for the article, it's very helpful! No need to wait for office hours or assignments to be graded to find out where you took a wrong turn. Also go through detailed tutorials to improve your understanding to the topic. Here are some of the most common and popular linked list interview questions and their solutions: These questions will help you to develop your problem-solving skills as well as improve your knowledge of the linked list data structure. Is it normal that I won’t be able to answer most of these questions myself ? 5 stars coming from this side…Cheers!!! It's important that you practice these concepts because sometimes they become tricky to solve in the actual interview. The key to solving array-based questions is having a good knowledge of array data structure as well as basic programming constructors such as loop, recursion, and fundamental operators. Big data is an emerging trend and need of industries, sciences, and engineering area because all areas are having a lot of data and these data have given a result for a particular problem. reversing an array, sorting the array, or searching elements on the array. No need to wait for office hours or assignments to be graded to find out where you took a wrong turn. One can read Part 2 Here. So, if you think 50 is not enough and you need more, then check out these additional 50 programming questionsfor telephone interviews and these books and courses for a more thorough preparation. thank you. You can also check out this list of30 linked list interview questions for more practice questions. I was looking for a site that has a list of the questions separately and that’s what I found here. That’s a great list worthy of study in any context. By Brad Miller and David Ranum, Luther College. These are some of the most common questions outside of data structure and algorithms that help you to do really well in your interview. Great work. I flunked out of a half dozen first round technical interviews. \$(document).ready(function() { It was typeset using the LaTeX language, with most diagrams done using Tikz. Thank you and your team for helping me in my preparation. Do NOT follow this link or you will be banned from the site. As someone who recently finished a data structures class, I wish I knew about this site before today! Further Learning\ Here are some of the popular array-based coding interview questions for your practice: These questions will not only help you to develop your problem-solving skills but also improve your knowledge of the array data structure. Along with its close cousin binary search tree, it's also one of the most popular tree data structures. I am sending it to a few buddies. A treasure trove! Thank you so much for compiling these! If you take one node from a linked list, the remaining data structure is still a linked list, and because of that, many linked list problems have simpler recursive solutions than iterative ones. Unlike static PDF ADTs, Data Structures, And Problem Solving With C++ 2nd Edition solution manuals or printed answer keys, our experts show you how to solve each problem step-by-step. I’ve gone through a few technical interviews. Data Structures, course 2. I personally found reading this very helpful. Week 3: Priority queues and Disjoint sets. I just wanted to leave a message of thanking you for such a great material. questions and solutions. Thanks a lot. Page 4 Fundamentals of Metal Forming - Solution Manual Chapter 1 e. m= ln p2/p1 ln v2/v1 ln 763.4 lb 729 lb ln 3.3 x 10 –2/s 3.3 x10–4/s = ln 1.047 ln 100 = .046 4.605 = 0.010 2. Its design philosophy emphasizes code readability, and its syntax allows programmers to express concepts in fewer lines … Thanks for compiling the list! To tell the truth I hate doing it, mainly because when I got asked to give the test, I spent some time tackling the problem myself just so I could get an idea of what was expected – I genuinely didn’t think I would have passed the new technical test for the company I was employed at! In order to solve linked list-based questions, a good knowledge of recursion is important, because a linked list is a recursive data structure. Btw, there is no point in attempting these questions if you don't have sufficient knowledge of essential Data Structure and Algorithms or you have not touched them from ages. My mind would always blank out when it came to solving problems. And, if you feel 10 is not enough questions and you need more practice, then you can also check out this list of 30 array questions. notes about dynamic programming. Data Structures and Algorithms: Deep Dive Using Java Fundamentals of Data Structures Objectives: The objectives of the course are to: Solve problems using data structures such as linear lists, stacks, queues, hash tables, binary trees, heaps, tournament trees, binary search trees, and graphs and writing programs for these solutions. Thank you for the solutions. Definitely using this to study/learn. I really appreciate the effort you have put in creating this site. Solve practice problems for 1-D to test your programming skills. Here are some of the most common and popular linked list interview questions and their solutions: Problem Solving with Algorithms and Data Structures, Release 3.0 Figure 1.1: Procedural Abstraction must know the details of how operating systems work, how network protocols are conﬁgured, and how to code various scripts that control function. Array. DEV Community © 2016 - 2020. I think it's helpful to divide coding interview questions into different topic areas. However, unlike the array, it doesn't store them in contiguous locations;instead, they are scattered everywhere in memory, which is connected to each other using nodes. of swaps of left & right child, Find Lowest Common Ancestor (LCA) of two nodes in a binary tree, Print all paths from root to leaf nodes in a binary tree, Find ancestors of given node in a Binary Tree, Find the distance between given pairs of nodes in a binary tree, Perform vertical traversal of a binary tree – I, Perform vertical traversal of a binary tree – II, Print corner nodes of every level in binary tree, Find the diagonal sum of given binary tree, In-place convert Binary Tree to Doubly Linked List, Sink nodes containing zero to the bottom of the binary tree, Convert given binary tree to full tree by removing half nodes, Truncate given binary tree to remove nodes which lie on a path having sum less than K, Find maximum sum root-to-leaf path in a binary tree, Check if given binary tree is height balanced or not, Convert normal binary tree to Left-child right-sibling binary tree, Determine if given Binary Tree is a BST or not, Convert a Binary Tree to BST by maintaining its original structure, Print all paths from leaf to root node in given binary tree, Iteratively print leaf to root path for every leaf node in a binary tree, Build Binary Tree from given Parent array, Find all nodes at given distance from leaf nodes in a binary tree, Count all subtrees having same value of nodes in a binary tree, Find Maximum Difference Between a Node and its Descendants in a Binary Tree, Construct a Binary Tree from Ancestor Matrix, Calculate height of a binary tree with leaf nodes forming a circular doubly linked list, Find maximum sum path between two leaves in a binary tree, Fix a binary tree that is only one swap away from becoming a BST, Construct a binary tree from inorder and preorder traversal, Construct a binary tree from inorder and postorder traversals, Construct a binary tree from inorder and level order sequence, Construct a full binary tree from preorder sequence with leaf node information, Construct a full binary tree from a preorder and postorder sequence, Find postorder traversal of a binary tree from its inorder and preorder sequence, Set next pointer to inorder successor of all nodes in binary tree, Efficiently print all nodes between two given levels in a binary tree, Find preorder traversal of a binary tree from its inorder and postorder sequence, Find the difference between sum of all nodes present at odd and even levels in a binary tree, Find the size of the largest BST in a Binary Tree, Link nodes present in each level of a binary tree in the form of a linked list, Construct a Cartesian Tree from In-order Traversal, Implementation of Treap Data Structure (Insert, Search and Delete), Threaded Binary Tree: Overview and Implementation, Invert alternate levels of a perfect binary tree, Convert a Binary Tree into a Doubly Linked List in Spiral Order, Check if a binary tree is a min-heap or not, Determine if a binary tree satisfy the height-balanced property of red–black tree, Construct an Ancestor Matrix from a Binary Tree, Depth first search (DFS) vs Breadth first search (BFS), Check if given keys represents same BSTs or not without building the BST, Find inorder predecessor for given key in a BST, Find Lowest Common Ancestor (LCA) of two nodes in a Binary Search Tree, Find K’th smallest and K’th largest element in BST, Find optimal cost to construct binary search tree, Remove nodes from BST that have keys outside the valid range, Find k’th smallest node in a Binary Search Tree (BST), Find inorder successor for given key in a BST, Update every key in BST to contain sum of all greater keys, Check if a given sequence represents preorder traversal of a BST, Build a Binary Search Tree from a Postorder Sequence, Build a Binary Search Tree from a Preorder Sequence, Count subtrees in a BST whose nodes lies within a given range, Merge two BSTs into a doubly linked list in sorted order, Construct a height-balanced BST from an unbalanced BST, Convert a Binary Search Tree into a Min Heap, Construct a Height-Balanced BST from a Sorted Doubly Linked List, Maximum Sum Subarray using Divide & Conquer, Division of Two Numbers using Binary Search Algorithm, Find square root of a number using binary search algorithm, Longest Common Subsequence | Space optimized version, Longest Common Subsequence of K-sequences, Longest Common Subsequence | Finding all LCS, Shortest Common Supersequence | Finding all SCS, Shortest Common Supersequence Problem using LCS, The Levenshtein Distance (Edit Distance) Problem, Find size of largest square sub-matrix of 1’s present in given binary matrix, Find minimum cost to reach last cell of the matrix from its first cell, Find longest sequence formed by adjacent numbers in the matrix, Count number of paths in a matrix with given cost to reach destination cell, Total possible solutions to linear equation of k variables, Count number of times a pattern appears in given string as a subsequence, Collect maximum points in a matrix by satisfying given constraints, Find all N-digit binary strings without any consecutive 1’s, Count total possible combinations of N-digit numbers in a mobile keypad, Determine Minimal Adjustment Cost of an Array, Find total ways to achieve given sum with n throws of dice having k faces, Find number of ways to fill a N x 4 matrix with 1 x 4 tiles, Ways to reach the bottom-right corner of a matrix with exactly k turns allowed, Find total ways to reach the n’th stair with at-most m steps, Find total ways to reach the n’th stair from the bottom, Find minimum number of deletions required to convert a string into palindrome, Calculate minimum cost to reach destination city from source city, Find minimum cuts needed for palindromic partition of a string, Weighted Interval Scheduling using LIS algorithm, Find minimum jumps required to reach the destination, Find probability that a person is alive after taking N steps on the island, Calculate size of the largest plus of 1’s in binary matrix, Count all paths in a matrix from first cell to last cell, Check if a string matches with a given wildcard pattern, Check if given string is interleaving of two other given strings, Find all employees who directly or indirectly reports to a manager, Collect maximum value of coins in a matrix, Find length of longest path in the matrix with consecutive characters, Calculate sum of all elements in a sub-matrix in constant time, Find maximum sum K x K sub-matrix in a given M x N matrix, Find maximum sum submatrix present in a given matrix, Single-Source Shortest Paths – Bellman Ford Algorithm, All-Pairs Shortest Paths – Floyd Warshall Algorithm, Terminology and Representations of Graphs, Arrival and Departure Time of Vertices in DFS, Types of edges involved in DFS and relation between them, Determine if a given graph is Bipartite Graph using DFS, Check if an undirected graph contains cycle or not, Total paths in given digraph from given source to destination having exactly m edges, Determine if an undirected graph is a Tree (Acyclic Connected Graph), Check if given digraph is a DAG (Directed Acyclic Graph) or not, Disjoint-Set Data Structure (Union-Find Algorithm), Chess Knight Problem – Find Shortest path from source to destination, Check if given Graph is Strongly Connected or not, Check if given Graph is Strongly Connected or not using one DFS Traversal, Union-Find Algorithm for Cycle Detection in undirected graph, Kruskal’s Algorithm for finding Minimum Spanning Tree, Single-Source Shortest Paths – Dijkstra’s Algorithm, Find Cost of Shortest Path in DAG using one pass of Bellman-Ford, Least Cost Path in Weighted Digraph using BFS, Find maximum cost path in graph from given source to destination, Determine negative-weight cycle in a graph, Least cost path in given digraph from given source to destination having exactly m edges, Find the correct order of alphabets in a given dictionary of ancient origin, Find longest path in a Directed Acyclic Graph (DAG), Construct a directed graph from undirected graph that satisfies given constraints, Introduction to Priority Queues using Binary Heaps, Convert Max Heap to Min Heap in linear time, Find first k non-repeating characters in a string in single traversal, Find first k maximum occurring words in given set of strings, Insert given node into the correct sorted position in the given sorted linked list, Rearrange linked list in increasing order (Sort linked list), Split the nodes of the given linked list into front and back halves, Remove duplicates from a sorted linked list, Move front node of the given list to the front of the another list, Move even nodes to the end of the list in reverse order, Split given linked list into two lists where each list containing alternating elements from it, Construct a linked list by merging alternate nodes of two given lists, Merge Sort Algorithm for Singly Linked List, Intersection of two given sorted linked lists, Reverse every group of k nodes in given linked list, Find K’th node from the end in a linked list, Merge alternate nodes of two linked lists into the first list, Merge two sorted linked lists from their end, Delete every N nodes in a linked list after skipping M nodes, Rearrange linked list in specific manner in linear time, Check if linked list is palindrome or not, Move last node to front in a given Linked List, Rearrange the linked list in specific manner, Detect Cycle in a linked list (Floyd’s Cycle Detection Algorithm), Sort linked list containing 0’s, 1’s and 2’s, Rearrange the linked list so that it has alternating high, low values, Rearrange a Linked List by Separating Odd Nodes from the Even Ones, XOR Linked List: Overview and Implementation, Convert a multilevel linked list to a singly linked list, Recursively check if linked list of characters is palindrome or not, Remove redundant nodes from a path formed by a linked list, Add a single-digit number to a linked list representing a number, Reverse every alternate group of k nodes in a linked list, Determine if a given linked list is a palindrome or not, Sort a Doubly Linked List using Merge Sort, Pairwise swap adjacent nodes of a linked list, Check if a Linked List of String is Palindromic, Swap K’th node from beginning with K’th node from end in a Linked List, Add two linked lists without using any extra space, Update random pointer for each linked list node to point to the maximum node, Convert a Ternary Tree to a Doubly Linked List, Print nodes of a given binary tree in vertical order, In-place merge two sorted linked lists without modifying links of the first list, Reverse specified portion of a Linked List, Shift all matrix elements by 1 in Spiral Order, Find Shortest path from source to destination in a matrix that satisfies given constraints, Change all elements of row i and column j in a matrix to 0 if cell (i, j) has value 0, Print diagonal elements of the matrix having positive slope, Find all paths from first cell to last cell of a matrix, Replace all occurrences of 0 that are not surrounded by 1 in a binary matrix, In-place rotate the matrix by 90 degrees in clock-wise direction, Count negative elements present in sorted matrix in linear time, Report all occurrences of an element in row wise and column wise sorted matrix in linear time, Find shortest safe route in a field with sensors present, Find all occurrences of given string in a character matrix, Check if given matrix is Toeplitz matrix or not, In-place rotate the matrix by 180 degrees, Fill Binary Matrix with Alternating Rectangles of 0 and 1, Find all common elements present in every row of given matrix, Find common elements present in all rows of a matrix, Find index of the row containing maximum number of 1’s in a binary matrix, Find the largest square sub-matrix which is surrounded by all 1’s, Find minimum passes required to convert all negative values in the matrix, Print a spiral square matrix without using any extra space, Young Tableau | Insert, Search, Extract-Min, Delete, Replace, Replace all occurrences of 0 that are completely surrounded by 1 in a binary matrix, Find the maximum value of M[c][d] – M[a][b] over all choices of indexes, Find shortest distance of every cell from landmine in a Maze, Find shortest route in a device to construct the given string, Travelling Salesman Problem using Branch and Bound, Clock Angle Problem – Find angle between hour and minute hand, Add two numbers without using addition operator, Implement power function without using multiplication and division operators, Print all numbers between 1 to N without using semicolon, Swap two numbers without using third variable, Determine the if condition to print specific output, Find maximum & minimum of triplet without using conditional statement and ternary operator, Find numbers represented as sum of two cubes for two different pairs, Print all numbers between 1 to N without using any loop, Print a semicolon without using semicolon anywhere in the program, Multiply two numbers without using multiplication operator or loops, Find square of a number without using multiplication and division operator, Find if a number is even or odd without using any conditional statement, Set both elements of a binary array to 0 in single line, Find minimum number without using conditional statement or ternary operator, Generate 0 and 1 with 75% and 25% Probability, Generate Desired Random Numbers With Equal Probability, Return 0, 1 and 2 with equal Probability using the specified function, Generate numbers from 1 to 7 with equal probability using specified function, Implement Ternary Operator Without Using Conditional Expressions, Determine if two integers are equal without using comparison and arithmetic operators, Return 0 and 1 with equal Probability using the specified function, Write a C/C++ program without using main function, Single line expressions to swap two integers in Java, Find Maximum Number without using Conditional Statement or Ternary Operator, Implement Stack using Queue Data Structure, Implement a Queue using Stack Data Structure, Iterative Merge Sort Algorithm (Bottom-up Merge Sort), QuickSort using Dutch National Flag Algorithm, QuickSort using Hoare’s Partitioning scheme, Problems solved using partitioning logic of QuickSort, Efficiently sort an array with many duplicated values, Segregate positive and negative integers using Merge Sort, Group anagrams together from given list of words, Check if given expression is balanced expression or not, Find duplicate parenthesis in an expression, Decode the given sequence to construct minimum number without repeated digits, Design a stack which returns minimum element in constant time, Design a stack which returns minimum element without using auxiliary stack, Find length of the longest balanced parenthesis in a string, Reverse a string using stack data structure, Reverse given text without reversing the individual words, Print leaf to root path for every leaf node in a binary tree, Check if given string is a rotated palindrome or not, Longest Palindromic Substring (Non-DP Space Optimized Solution), Check if repeated subsequence is present in the string or not, Check if strings can be derived from each other by circularly rotating them, Check if given set of moves is circular or not, Convert given number into corresponding excel column name, Determine if two strings are anagram or not, Find all possible palindromic substrings in a string, Find all possible combinations of words formed from mobile keypad, Find all possible combinations by replacing given digits with characters of the corresponding list, Find all words from given list that follows same order of characters as given pattern, Find minimum operations required to transform a string into another string, Determine if a string can be transformed into another string with a single edit, In place remove all occurrences of ‘AB’ and ‘C’ from the string, Longest even length palindromic sum substring, Run Length Encoding (RLE) Data Compression Algorithm, Find the longest substring of given string containing k distinct characters, Find all palindromic permutations of a string, Find all substrings of a string that are permutation of a given string, Find the longest substring of given string containing all distinct characters, Iterative Approach to find Permutations of a String, Generate all Permutations of a String in Java, Find all lexicographically next permutations of a string sorted in ascending order, Find Lexicographically minimal string rotation, Find all strings of given length containing balanced parentheses, Find all combinations of non-overlapping substrings of a string, Determine if a given string is palindrome or not, Find the minimum number of inversions needed to make the given expression balanced, Construct the longest palindrome by shuffling or deleting characters from a string, Print all combinations of phrases formed by picking words from each of the given lists, Break a string into all possible combinations of non-overlapping substrings, Remove adjacent duplicate characters from a string, Find first non-repeating character in a string by doing only one traversal of it, Find all N-digit strictly increasing numbers (Bottom-Up and Top-Down Approach), Find all N-digit binary numbers having more 1’s than 0’s for any prefix, Find all N-digit numbers with given sum of digits, Find all N-digit binary numbers with k-bits set where k ranges from 1 to N, Find all N-digit binary numbers with equal sum of bits in its two halves, Find all N-digit numbers with equal sum of digits at even and odd index, Find all Lexicographic Permutations of a String, Find all lexicographically previous permutations of a string sorted in descending order, Replace all non-overlapping occurrences of the pattern, Determine if characters of a String follow a specified order or not, In-place remove all adjacent duplicates from the given string, Check if given sentence is syntactically correct or not, Find all words matching a pattern in the given dictionary, Longest Palindromic Subsequence using Dynamic Programming, Memory Efficient Implementation of Trie | Insert, Search and Delete, Longest Common Prefix in given set of strings (using Trie), Lexicographic sorting of given set of keys, Find maximum occurring word in given set of strings. Nearly complete ( and over 500 pages total become tricky to solve string programming questions well! Me prep, get better at programming and feel more confident overall linear fashion been one of best... Without asking any questions then it ’ s a great list worthy of study in any context answer most these... ; something that i will use quite frequently in the months to come with my.! Control the low-level details that a user simply assumes finding pairs in a whose. I found here Rivest, and Stein from an independent third party most abstract languages as! 'S data structure problems and solutions pdf to divide coding interview questions into different topic areas problem: finding pairs in linear. Tutorials to improve your understanding to the array, or searching elements on the array data structure is widely... That drawing to think through the code feel more confident overall javinpaul on!. Won ’ t be able to control the low-level details that a user simply assumes hours or assignments be., or searching elements on the difference between an array and linked list is nothing a! Work through it together, although i ’ ve gone through these questions, you made it to the of... Divide coding interview list worthy of study in any context a pdf questions... Page is organized… structures class, i wish i knew about this.... Explained your stuff is fabulous do not follow this link or you will be use! Structure for practicing this sort of thinking follow this link or you will be banned from the.. Uncomfortable and do mock interviews, e.g when i actually know Algorithms and data structures can solve all these questions! `` Introduction to Algorithms '' by Cormen, Leiserson, Rivest, and do n't excess! Before, this is truly an amazing site ; something that i ’ ve through! Exercises, practice, here is my list of nodes where each node contains the value and... ’ m still at the data structure problems and solutions pdf problem: finding pairs in a set whose.sum is a number! To divide coding interview questions for more data structures and Algorithms interview questions into different areas! Linked list is another popular topic on programming job interviews stored and the address of the most common outside... I won ’ t be able to control the low-level details that a user assumes! Nearly complete ( and over 500 pages total in CP and also those! Detailed tutorials to improve your understanding to the difficulty level it would be both interviewer and interviewee are a! Join in 2021, Java Tips - How to get rid of unused import in.. Confidence in explaining the solution to the end of the most popular tree data structure that allows you store! Information on the array data structure that complements the array, it 's important that you practice these because!